6FY1:
reference: Common helical V1V2 conformations of HIV-1 Envelope expose the alpha4beta7 binding site on intact virions., Wibmer CK, Richardson SI, Yolitz J, Cicala C, Arthos J, Moore PL, Morris L, Nat Commun. 2018 Oct 26;9(1):4489. doi: 10.1038/s41467-018-06794-x. PMID: 30367034

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).